Improvement in rotary engines



2 Sheets--SheetL A'. D I ETZ.

Rotary-E-ngnes.

ATTORNEYS. v

TNE GRAPHIC CO, PHOTO -LITHS 8| 4l vARK FLACE,N.Y.

AUGUST DIETZ, OF NEW YORK, N. Y.,

PATENT OFFICE.

ASSIGNOR TO HllldSEllF AND E. J. DE

sMEDT, or sAME PLACE.

IMPROVEMENT IN RQTARV ENGINES.

Specification forming part of Letters Patent No. 154,231, dated August 18, 1874 applicationV tiled May 16, 1874.

To all whom it may concern:

Be it known that I, AUGUST DIETZ, of the city, county, and State of New York, have invented a new and Improved Rotary Engine,

Y of which the following is a specification:

In the accompanying drawing, Figure 1 represents a vertical transverse section, on line c c of Fig. 2, of my improved rotary engine, showing steam-distributing piston-valve; Fig. 2, a

vertical longitudinal section online k It, Fig.

l; Fig. 3, a vertical transverse section on thesists of a cylindrical casing with radial spring slides or win gs, which are suitably packed and acted upon by the elliptic piston,1 rotating tightly therein by means of combined spring and steam-packed strips. The piston is keyed to the hollow shaft, through which the steam enters, and provided with variable cut-oft' and distribution valve at one side, and with an exhaust-valve at the opposite side, both being closely pressed against the cylinder-heads by spring and steam packing devices.' "The ports of this'distribution-valve conduct the steam through entrance-ports lof `one cylinder-head into the interior of the engine, -Where it causes the rotation or" the piston in connection with the spring-slides, exhausting the steam simultaneously therewith by perforations of the pistonat opposite sides from the parts acted upon, being then conducted through the exhaustvalve and'ports of the opposite cylinder-head to the exhaust-pipe.

ln the drawing, A represents the'cylinder of my rotary engine, which is provided with three longitudinal land equidistant openings,

'A1, for guiding the spring slides or ywings B in radial direction therein. The spring-slides B are tightly packed in the longitudinal guideopenings A1 by suitable stuffing-boxes a, in

order to prevent the escape of steam by the wearing out of the slides. Extension casings or boxes B1 are cast or otherwise applied to Acylinder A, for closing the same completely toward the outside. The piston G is of doubleeccentric or elliptical shape and keyed to the f form the side extensions of recesses b, and receive the extension-tongues d of the sliding valves E E. The top and bottom grooves b are further arranged in radial directionwith perforations e, in which slide the spiral springs el, with base pistons e2.- The perforations e communicate, by small bottom holes e3, with the chambers of the slide-valves E E', and receive from them the required steampressure for forcing the packing strips b close against inner periphery of the cylinder during.

the rotation of the piston. The central connecting part of the piston, intermediate between slide-valves E E', is in similar manner perforated in longitudinal direction by holes f, with spring fl and balance-pressure holes f2,- through which the steam enters toward the rear part of the valves E E, and packs them closely with their face parts against the heads of the cylinder, producing thus a continuous steam-tight fitting thereon. 'A series of holes, g, is furthermore drilled at the exhaust side of the piston at diametrically-opposite points, through which the expanded steam is conducted from the cylinder to the exhaust-valve E. rEhe induction and distribution valve E Vhas an interior cylinder, h, of larger diameterthan the hollowshaft, provided with slotted recessesh1 at the circumference, of which each recess communicates with a separate chamber "or port, h2, formed by radial partitions h3.

Both face-sides of the pis- These ports are arranged dialnetrically opposite to each other, as shown in Figs. f5Yand 6,

in g in the interior'cylinder h'ofthe distributionvalve E, and being operated by a connectingvalve rod, fi, whose diametrical piston-arms t1 move in corresponding slots 2 of the hollow shaft. i

A second smaller piston, F', is attached to inner end of valve-rod t', sliding in the hollow shaft, and serving, by the steam pressure thereon, to open one or all of the inductionports of valve E. Piston F serves also for closing, by drawing out the piston-rod`far enough, the shaft-apertures l, which lead into the exhaust-valve E', for vpacking the same tightly on yits cylinder-head. The segmentpiston F closes, at the same time, the induction-ports in the distribution-valve E, so that the-pistons may jointly act as a throttle-valve, which may be connected and operated readily `with a horizontal or vertical governor.

rEhe exhaust-valve E' 1s constructed in similar manner as valve E, with an interior cylinder, but without recesses, and has only two separate and diametrically-opposite chambers or exhaust-ports, into which the exhaust perforations of the piston open.

The front cylinder-head A1 is cast with distribution channels or ports m, which connect with the openings of the induction-ports of the distribution-valve E, while the rear cylinderhead A3 has exhaust-ports m1, through which the expanded steam is carried olf by a suitable exit-aperture, m2, as shown in Fig. 2. The

cylinderheads A2 A3 are rmly and tightly bolted on the body of the cylinder, and pro-- vided with thicker rims or flanges, through which pass the adjustable rods n, for connecting the spring slide-pieces B with spring rings or cams G. Rods u have hook-shaped ends n', by which they are rmly held on the springrings G, sothat the spring-slides B are always rmly pressed with their roundedoff corner ends on the piston, while their ends `slide in corresponding side grooves B2 of the 1 cylinder-heads.

valves E E', for pushing the sameV against the cylinder-heads, and forces, also, the packing-strips b of the piston tightly on the cylinder. The steam enters then, through the slotted induction-recesses ofthe inductionmanner without counter pressure.

valve E, intothe ports of the same, and from them, through the connecting-portsof the front cylinder-head, into the inside of the cylinder, acting there simultaneously at opposite points on the piston by means lof the compartments formed between the springslides and theextreme points of the piston. The compartments on the opposite sides ot' the slides serve for exhausting the expanded steam through the exhaust-holes of the piston.- -Every rotation of the piston (which is exposed three times to the action of live steam in passing the connecting ports of the front head) is produced `by six steam-inductions, which may be increased by opening the additional recesses, exhausting in the same The exhaust steam passes oif, through the opposite valve E and the connecting exhaust-ports of the cylinder-head A3, to the exhaust-pipe, the passage of the steam being indicated by arrows in the various figures.

For the purpose of working the engine ex` pansively, the outside end of the piston-rod is applied to a screw-wheel or lever for closing the.V` innermost,or two innermost, inductionapertures of the distribution-valve E, so that V no steam can enter into their chambers or ports,

haust. This expansive action of the steam is represented by a diagram in Fig. 1, and repeats itself six times in every complete revolution, so that dead-points are entirely over- CO i116.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination of cylinder A, radial spring slide-pieces B, hollow shaft D, elliptical piston C, sliding steam-packed induction and exhaust valves E E', and cylinder heads A2 A3, provided with valve connecting ports m and m1, all arranged and constructed substantially in the manner and for the purpose specified.

2. I n the'double-eccentric or elliptical piston C, the combination of the longitudinal packing-strips, the exhaust holes g, and the cylindrical end cavities, substantially as and for the purpose specified.

3. The combination of the selfadjusting valves E E and their ports h1 h2, the-longitudinal spiral springs, the cylinder-heads, with their ports m m1, and the piston C, substantially as and for the purpose specified.

4. The combination of the induction valve E with the segment-piston F, piston F', and rod i, for the purpose of forming a cut-oi for the steam, substantially as and for the purpose specied.

5. The exhaust-valve E', having chambers or ports formed by radial partitions, in combinationwith the exhaust perforations g of the piston C, and the communicating chambers m1 l to hold the pieces B 4.tight against the ,piston of eylinderhead A3, for conduct-,ing the eX- C, substantially as and for the purpose specipanded steam to the exhaust-pipe, substanfied. tially as and for the purpose specified. Y

6. The combination of the radial spring sldey Witnesses:

pieces B, the connecting rods n', and. the PAUL G oEPEL, outer spring rings G5 alloperating together Y T. B. MOSHER. l

`AUGUST DIET'Z. 

